Transcript
MIC5501/2/3/4 Single 300mA LDO in 1.0mm × 1.0mm DFN Package
General Description
Features
The MIC5501/2/3/4 is an advanced general-purpose LDO ideal for powering general-purpose portable devices. The MIC5501/2/3/4 family of products provides a highperformance 300mA LDO in an ultra-small 1mm × 1mm package. The MIC5502 and MIC5504 LDOs include an auto-discharge feature on the output that is activated when the enable pin is low. The MIC5503 and MIC5504 have an internal pull-down resistor on the enable pin that disables the output when the enable pin is left floating. This is ideal for applications where the control signal is floating during processor boot up. Ideal for battery-powered applications, the MIC5501/2/3/4 offers 2% initial accuracy, low dropout voltage (160mV at 300mA), and low ground current (typically 38µA). The MIC5501/2/3/4 can also be put into a zero-off-mode current state, drawing virtually no current when disabled. The MIC5501/2/3/4 has an operating junction temperature range of –40°C to 125°C. Datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com.
• • • • • • • • • • • •
Input voltage range: 2.5V to 5.5V Fixed output voltages from 1.0V to 3.3V 300mA guaranteed output current High output accuracy (±2%) Low quiescent current: 38µA Stable with 1µF ceramic output capacitors Low dropout voltage: 160mV @ 300mA Output discharge circuit: MIC5502, MIC5504 Internal enable pull-down: MIC5503, MIC5504 Thermal-shutdown and current-limit protection 4-lead 1.0mm × 1.0mm Thin DFN package MIC5504 5-pin SOT23 package
Applications • • • • •
Smart phones DSC, GPS, PMP, and PDAs Medical devices Portable electronics 5V systems
___________________________________________________________________________________________________________
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 5, 2014
Revision 2.3
Micrel, Inc.
MIC5501/2/3/4
Ordering Information Part Number
Output (1) Voltage
AutoDischarge
EN Pull-Down
Temperature Range
MIC5501-3.3YMT
VS
3.3V
NO
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5501-3.0YMT
VP
3.0V
NO
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5501-2.8YMT
VM
2.8V
NO
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5501-1.8YMT
VG
1.8V
NO
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
(4)
V4
1.2V
NO
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
(4)
XS
3.3V
YES
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5502-3.0YMT
(4)
XP
3.0V
YES
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5502-2.8YMT
XM
2.8V
YES
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5502-1.8YMT
XG
1.8V
YES
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
(4)
(4)
MIC5501-1.2YMT MIC5502-3.3YMT
Package
(2,3)
Marking Code
(4)
X4
1.2V
YES
NO
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
(4)
SV
3.3V
NO
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
(4)
ZV
3.0V
NO
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
(4)
MV
2.8V
NO
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5502-1.2YMT MIC5503-3.3YMT MIC5503-3.0YMT MIC5503-2.8YMT
MIC5503-1.8YMT
YV
1.8V
NO
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5503-1.2YMT
XV
1.2V
NO
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5504-3.3YMT
SX
3.3V
YES
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5504-3.1YMT
TX
3.1V
YES
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5504-3.0YMT
PX
3.0V
YES
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5504-2.8YMT
MX
2.8V
YES
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5504-2.2YMT
UW
2.2V
YES
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5504-1.8YMT
GX
1.8V
YES
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5504-1.2YMT
ZX
1.2V
YES
YES
–40°C to +125°C
4-Pin 1mm x 1mm Thin DFN
MIC5504-3.3YM5
WXS
3.3V
YES
YES
–40°C to +125°C
5-Pin SOT23
MIC5504-2.8YM5
WXM
2.8V
YES
YES
–40°C to +125°C
5-Pin SOT23
MIC5504-2.5YM5
WXJ
2.5V
YES
YES
–40°C to +125°C
5-Pin SOT23
MIC5504-1.8YM5
WXG
1.8V
YES
YES
–40°C to +125°C
5-Pin SOT23
MIC5504-1.2YM5
WX4
1.2V
YES
YES
–40°C to +125°C
5-Pin SOT23
(4)
Notes: 1.
Other voltages available. Contact Micrel for details.
2.
Thin DFN ▲ = Pin 1 identifier.
3.
Thin DFN is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
4.
Contact Micrel Marketing for availability.
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Micrel, Inc.
MIC5501/2/3/4
Pin Configuration
4-Pin 1mm × 1mm Thin DFN (MT) (Top View)
5-Pin SOT23 (M5) (Top View)
Pin Description Pin Name
Pin Number Thin DFN-4
Pin Number SOT23-5
VOUT
1
5
Output Voltage. When disabled the MIC5502 and MIC5504 switches in an internal 25Ω load to discharge the external capacitors.
GND
2
2
Ground
EN
3
3
Enable Input: Active High. High = ON; Low = OFF. For MIC5501 and MIC5502 do not leave floating. MIC5503 and MIC5504 have an internal pull-down and this pin may be left floating.
VIN
4
1
Supply Input.
NC
-
4
No Connection. Pin is not internally connected.
ePad
EP
-
Exposed Heatsink Pad. Connect to GND for best thermal performance.
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Pin Function
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Micrel, Inc.
MIC5501/2/3/4
Absolute Maximum Ratings(5)
Operating Ratings(6)
Supply Voltage (VIN) .......................................... –0.3V to 6V Enable Voltage (VEN). ........................................ –0.3V to VIN (7) Power Dissipation (PD) ........................... Internally Limited Lead Temperature (soldering, 10s) ............................ 260°C Junction Temperature (TJ) ........................ –40°C to +150°C Storage Temperature (Ts) ......................... –65°C to +150°C (8) ESD Rating .................................................................. 3kV
Supply Voltage (VIN) ......................................... 2.5V to 5.5V Enable Voltage (VEN) .............................................. 0V to VIN Junction Temperature (TJ) ........................ –40°C to +125°C Junction Thermal Resistance 1mm × 1mm Thin DFN-4 (θJA) ......................... 250°C/W 5-pin SOT23 (θJA) ............................................ 253°C/W
Electrical Characteristics(9) VIN = VEN = VOUT + 1V; CIN = COUT = 1µF; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C to +125°C, unless noted. Parameter Output Voltage Accuracy Line Regulation
Min.
Max.
Units
Variation from nominal VOUT Variation from nominal VOUT; –40°C to +125°C
–2.0
+2.0
%
–3.0
+3.0
%
0.3
%/V
8
40
mV
IOUT = 150mA
80
190
mV
IOUT = 300mA
160
380
mV
IOUT = 0mA
38
55
IOUT = 300mA
42
65
0.05
1
VIN = VOUT +1V to 5.5V; IOUT = 100µA
Load Regulation Dropout Voltage
Condition
(10)
Ground Pin Current
0.02
IOUT = 100µA to 300mA
(11)
(12)
Ground Pin Current in Shutdown
VEN = 0V
Ripple Rejection
f = 1kHz; COUT = 1µF
Current Limit
VOUT = 0V
Output Voltage Noise
COUT = 1µF, 10Hz to 100kHz
Auto-Discharge NFET Resistance
MIC5502, MIC5504 Only; VEN = 0V; VIN = 3.6V;
Typ.
60 400
IOUT = –3mA
630
µA µA dB
900
mA
175
µVRMS
25
Ω
4
MΩ
Enable Input Enable Pull-Down Resistor Enable Input Voltage
For MIC5503 and MIC5504 use only
0.2
Logic Low
V
1.2
Logic High
V
Enable Input Current
VEN = 0V
0.01
1
µA
MIC5501, MIC5502
VEN = 5.5V
0.01
1
µA
Enable Input Current
VEN = 0V
0.01
1
µA
MIC5503, MIC5504
VEN = 5.5V
1.4
2
µA
Turn-On Time
COUT = 1µF; IOUT = 150mA
50
125
µs
Notes: 5. Exceeding the absolute maximum rating may damage the device. 6. The device is not guaranteed to function outside its operating rating. 7. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. 8. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF. 9. Specification for packaged product only. 10. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Changes in output voltage due to heating effects are covered by the thermal regulation specification. 11. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. For outputs below 2.5V, dropout voltage is the input-to-output differential with the minimum input voltage 2.5V. 12. Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin current.
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Micrel, Inc.
MIC5501/2/3/4
Typical Characteristics -100
IOUT = 100mA
-60 -50 -40
IOUT = 300mA
-30 COUT = 1µF CIN = 1µF VIN = 3.8V VOUT = 2.8V
-20 -10 0 10 10
100
1k 1,000
120 100 80 60 40 VOUT = 3.3V CIN = COUT = 1µF
20
50
GROUND CURRENT (µA)
40
100µA
30 VEN = VIN VOUT = 3.3V CIN = COUT = 1µF
100
150
200
250
-40
300
4.0
4.5
-20
0
5.0
50 48
44 43 42 41 40 39
5.5
VIN = VEN = VOUT + 1 VOUT = 3.3V CIN = COUT = 1µF
60
80
100
120
300mA
46 44 42
50mA
40
150mA
38
100µA
36 VIN = VEN = VOUT + 1V VOUT = 3.3V CIN = COUT = 1µF
34 32 30
0
50
SUPPLY VOLTAGE (V)
100
150
200
250
300
-40
-20
LOAD CURRENT (mA)
Output Voltage vs. Output Current
0
20
40
60
80
100
120
TEMPERATURE (°C)
Output Voltage vs. Temperature
Output Voltage vs. Supply Voltage
3.50
40
Ground Current vs. Temperature
45
38
20
TEMPERATURE (°C)
36 3.5
50mA
40
46
37
20 3.0
60
20
3.50
3.5 3.4
OUTPUT VOLTAGE (V)
3.45 3.40 3.35 3.30 3.25 VIN = VEN = VOUT+ 1V VOUT = 3.3V CIN = COUT = 1µF
3.20 3.15
3.45
3.3
50mA
3.2 3.1 3.0 150mA 2.9 2.8 300mA
VIN = VEN VOUT = 3.3V CIN = COUT = 1µF
2.7 2.6
3.10
OUTPUT VOLTAGE (V)
GROUND CURRENT (µA)
300mA
2.5
150mA
80
Ground Current vs. Load Current
50
25
100
OUTPUT CURRENT (mA)
Ground Current vs. Supply Voltage
35
VOUT = 3.3V CIN = COUT = 1µF
120
0
0
FREQUENCY (Hz)
45
140
0
10k 100k 1,000,000 1M 10,000 100,000
300mA
160
GROUND CURRENT (µA)
-70
180
140
DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE (mV)
-80
PSRR (dB)
200
160
-90
OUTPUT VOLTAGE (V)
Dropout Voltage vs.Temperature
Dropout Voltage vs. Output Current
Power Supply Rejection Ratio
50
100
150
200
250
OUTPUT CURRENT (mA)
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300
3.35
300mA
3.30 150mA VIN = VOUT+ 1V VOUT = 3.3V CIN = COUT = 1µF
3.25
3.20
2.5 0
3.40
2.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
5
5.0
5.5
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
Revision 2.2
Micrel, Inc.
MIC5501/2/3/4
Typical Characteristics (Continued) Current Limit vs. Supply Voltage 750
CURRENT LIMIT (mA)
700 650 600 550 500 450 400
VOUT = 1.2V CIN = COUT = 1µF
350 300 2.5
3
3.5
4
4.5
5
5.5
SUPPLY VOLTAGE (V)
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MIC5501/2/3/4
Functional Characteristics
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MIC5501/2/3/4
Block Diagram
MIC550x Block Diagram
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MIC5501/2/3/4
Application Information
Enable/Shutdown The MIC5501/2/3/4 comes with an active-high enable pin that allows the regulator to be disabled. Forcing the EN pin low disables the regulator and sends it into an off mode current state drawing virtually zero current. When disabled the MIC5502 and MIC5504 switches an internal 25Ω load on the regulator output to discharge the external capacitor. Forcing the EN pin high enables the output voltage. The MIC5501 and MIC5502 enable pin uses CMOS technology and the EN pin cannot be left floating; a floating EN pin may cause an indeterminate state on the output. The MIC5503 and MIC5504 have an internal pulldown resistor on the enable pin to disable the output when the enable pin is floating.
MIC5501/2/3/4 are low-noise 300mA LDOs. The MIC5502 and MIC5504 include an auto-discharge circuit that is switched on when the regulator is disabled through the enable (EN) pin. The MIC5503 and MIC5504 have an internal pull-down resistor on the EN pin to ensure the output is disabled if the control signal is tristated. The MIC5501/2/3/4 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. Input Capacitor The MIC5501/2/3/4 is a high-performance, highbandwidth device. An input capacitor of 1µF is required from the input to ground to provide stability. Low-ESR ceramic capacitors provide optimal performance at a minimum of space. Additional high-frequency capacitors, such as small-valued NPO dielectric-type capacitors, help filter out high-frequency noise and are good practice in any RF-based circuit. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended.
Thermal Considerations The MIC5501/2/3/4 is designed to provide 300mA of continuous current in a very small package. Maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. For example if the input voltage is 3.6V, the output voltage is 2.8V, and the output current = 300mA. The actual power dissipation of the regulator circuit can be determined using Equation 1:
Output Capacitor The MIC5501/2/3/4 requires an output capacitor of 1µF or greater to maintain stability. The design is optimized for use with low-ESR ceramic chip capacitors. High ESR capacitors are not recommended because they may cause high-frequency oscillation. The output capacitor can be increased, but performance has been optimized for a 1µF ceramic output capacitor and does not improve significantly with larger capacitance. X7R/X5R dielectric-type ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by 15% over their operating temperature range and are the most stable type of ceramic capacitors. Z5U and Y5V dielectric capacitors change value by as much as 50% and 60%, respectively, over their operating temperature ranges. To use a ceramic chip capacitor with Y5V dielectric, the value must be much higher than an X7R ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range.
PD = (VIN – VOUT1) I OUT + VIN IGND
Because this device is CMOS and the ground current is typically <100µA over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation: PD = (3.6V – 2.8V) × 300mA PD = 0.240W To determine the maximum ambient operating temperature of the package, use the junction-to-ambient thermal resistance of the device and Equation 2:
TJ(max) − TA PD(max) = θ JA
No-Load Stability Unlike many other voltage regulators, the MIC5501/2/3/4 remains stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications.
May 5, 2014
Eq. 1
Eq. 2
TJ(max) = 125°C, the maximum junction temperature of the die, θJA thermal resistance = 250°C/W for the DFN package.
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MIC5501/2/3/4
Substituting PD for PD(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. The junction-toambient thermal resistance for the minimum footprint is 250°C/W. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5501-MYMT at an input voltage of 3.6V and 300mA load with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.240W = (125°C – TA)/(250°C/W) TA = 65°C Therefore, the maximum ambient operating temperature allowed in a 1mm × 1mm DFN package is 65°C. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the “Regulator Thermals” section of Micrel’s Designing with Low-Dropout Voltage Regulators handbook. This information can be found on Micrel's website at: http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
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MIC5501/2/3/4
Typical Application
Bill of Materials Item
Part Number
C1, C2
GRM155R61A105KE15D
Manufacturer Murata
(13)
Description
Qty.
Capacitor, 1µF Ceramic, 10V, X5R, Size 0402
2
Single 300mA LDO in 1.0mm × 1.0mm DFN Package
1
MIC5501-xYMT U1
MIC5502-xYMT MIC5503-xYMT
(14)
Micrel, Inc.
MIC5504-xYMT Notes: 13. Murata: www.murata.com. 14. Micrel, Inc.: www.micrel.com.
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MIC5501/2/3/4
PCB Layout Recommendations (1mm × 1mm Thin DFN)
Top Layer
Bottom Layer
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MIC5501/2/3/4
Package Information(15) and Recommended Landing Pattern
4-Pin 1mm x 1mm Thin DFN (MT)
Note: 15. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
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MIC5501/2/3/4
Package Information(15) and Recommended Landing Pattern (continued)
5-Pin SOT23 (M5)
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MIC5501/2/3/4
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2012 Micrel, Incorporated.
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